Research on Control of Ore Pass Dust by Unloading Time Interval and Foam Control Technology
Yapeng Wang1, Zhongan Jiang1, Jiuzhu Wang1
1School of Civil and Resources Engineering, University of Science and Technology Beijing, 30 Xueyuan Road, Haidian District, Beijing 100083, China.
Abstract:
To control the dust pollution caused by the unloading of a multilevel ore pass, numerical simulation and similar experiments were carried out to study the airflow and dust migration influenced by the unloading quantity and the continuous unloading at different time intervals in the ore pass. From this research, the following conclusions are drawn: when the first level of the ore pass is unloaded, the third and fourth levels are the main dust-producing positions, and the concentrations of dust in the breathing zone can reach 85 and 325 mg/m3, respectively. Increasing the unloading interval and reducing the total single unloading quantity can prevent the superposition of dust production. The foam dust removal technology can reduce the secondary dust generation caused by the backlash of the airflow in the ore pass, and the dust emission rate can reach 60% at the fourth level.
Related Concept Videos
Load-frequency control
Control Systems
At the heart...
Quarrying of Stone
One common method involves using a diamond belt saw to cut large blocks from the quarry face. These blocks can be about 50 feet long and 12 feet high. After the initial vertical cut, drilling is performed at the base of the...
Time-Domain Interpretation of PD Control
Consider the example of control of motor torque. Initially, a positive...
Pumped Concrete
For direct-acting pumps, the concrete enters the pump via the inlet valve under the action of gravity and suction created by the movement of the piston. This concrete is then forced into the pipeline and out through the outlet valve by the forward movement...
Shotcrete


